1 // SPDX-License-Identifier: GPL-2.0-only
68 	struct i2c_adapter *adap = client->adapter;  in ps8622_set()
72 	msg.addr = client->addr + page;  in ps8622_set()
80 			client->addr + page, reg, val, ret);  in ps8622_set()
86 	struct i2c_client *cl = ps8622->client;  in ps8622_send_config()
110 	 * [3:2] CDR tune wait cycle before measure for fine tune  in ps8622_send_config()
137 	/* [7:5] DCO_FTRNG=+-40% */  in ps8622_send_config()
147 	/* Gitune=-37% */  in ps8622_send_config()
167 	/* [7:6] Right-bar GPIO output strength is 8mA */  in ps8622_send_config()
179 	err = ps8622_set(cl, 0x01, 0x02, 0x80 | ps8622->max_lane_count);  in ps8622_send_config()
184 	err = ps8622_set(cl, 0x01, 0x21, 0x80 | ps8622->lane_count);  in ps8622_send_config()
272 	if (ps8622->bl) {  in ps8622_send_config()
280 				ps8622->bl->props.brightness);  in ps8622_send_config()
290 	/* Set LVDS output as 6bit-VESA mapping, single LVDS channel */  in ps8622_send_config()
300 	/* Set SSC enabled and +/-1% central spreading */  in ps8622_send_config()
311 	/* LC -> RCO */  in ps8622_send_config()
320 	return err ? -EIO : 0;  in ps8622_send_config()
325 	struct ps8622_bridge *ps8622 = dev_get_drvdata(&bl->dev);  in ps8622_backlight_update()
328 	if (!ps8622->enabled)  in ps8622_backlight_update()
329 		return -EINVAL;  in ps8622_backlight_update()
331 	ret = ps8622_set(ps8622->client, 0x01, 0xa7, brightness);  in ps8622_backlight_update()
345 	if (ps8622->enabled)  in ps8622_pre_enable()
348 	gpiod_set_value(ps8622->gpio_rst, 0);  in ps8622_pre_enable()
350 	if (ps8622->v12) {  in ps8622_pre_enable()
351 		ret = regulator_enable(ps8622->v12);  in ps8622_pre_enable()
353 			DRM_ERROR("fails to enable ps8622->v12");  in ps8622_pre_enable()
356 	gpiod_set_value(ps8622->gpio_slp, 1);  in ps8622_pre_enable()
371 	gpiod_set_value(ps8622->gpio_rst, 1);  in ps8622_pre_enable()
382 	ps8622->enabled = true;  in ps8622_pre_enable()
395 	if (!ps8622->enabled)  in ps8622_post_disable()
398 	ps8622->enabled = false;  in ps8622_post_disable()
405 	gpiod_set_value(ps8622->gpio_slp, 0);  in ps8622_post_disable()
407 	if (ps8622->v12)  in ps8622_post_disable()
408 		regulator_disable(ps8622->v12);  in ps8622_post_disable()
416 	gpiod_set_value(ps8622->gpio_rst, 0);  in ps8622_post_disable()
426 	return drm_bridge_attach(ps8622->bridge.encoder, ps8622->panel_bridge,  in ps8622_attach()
427 				 &ps8622->bridge, flags);  in ps8622_attach()
447 	struct device *dev = &client->dev;  in ps8622_probe()
454 		return -ENOMEM;  in ps8622_probe()
456 	panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);  in ps8622_probe()
460 	ps8622->panel_bridge = panel_bridge;  in ps8622_probe()
461 	ps8622->client = client;  in ps8622_probe()
463 	ps8622->v12 = devm_regulator_get(dev, "vdd12");  in ps8622_probe()
464 	if (IS_ERR(ps8622->v12)) {  in ps8622_probe()
466 		ps8622->v12 = NULL;  in ps8622_probe()
469 	ps8622->gpio_slp = devm_gpiod_get(dev, "sleep", GPIOD_OUT_HIGH);  in ps8622_probe()
470 	if (IS_ERR(ps8622->gpio_slp)) {  in ps8622_probe()
471 		ret = PTR_ERR(ps8622->gpio_slp);  in ps8622_probe()
480 	ps8622->gpio_rst = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in ps8622_probe()
481 	if (IS_ERR(ps8622->gpio_rst)) {  in ps8622_probe()
482 		ret = PTR_ERR(ps8622->gpio_rst);  in ps8622_probe()
487 	ps8622->max_lane_count = id->driver_data;  in ps8622_probe()
489 	if (of_property_read_u32(dev->of_node, "lane-count",  in ps8622_probe()
490 						&ps8622->lane_count)) {  in ps8622_probe()
491 		ps8622->lane_count = ps8622->max_lane_count;  in ps8622_probe()
492 	} else if (ps8622->lane_count > ps8622->max_lane_count) {  in ps8622_probe()
493 		dev_info(dev, "lane-count property is too high,"  in ps8622_probe()
495 		ps8622->lane_count = ps8622->max_lane_count;  in ps8622_probe()
498 	if (!of_property_read_bool(dev->of_node, "use-external-pwm")) {  in ps8622_probe()
499 		ps8622->bl = backlight_device_register("ps8622-backlight",  in ps8622_probe()
502 		if (IS_ERR(ps8622->bl)) {  in ps8622_probe()
504 			ret = PTR_ERR(ps8622->bl);  in ps8622_probe()
505 			ps8622->bl = NULL;  in ps8622_probe()
508 		ps8622->bl->props.max_brightness = PS8622_MAX_BRIGHTNESS;  in ps8622_probe()
509 		ps8622->bl->props.brightness = PS8622_MAX_BRIGHTNESS;  in ps8622_probe()
512 	ps8622->bridge.funcs = &ps8622_bridge_funcs;  in ps8622_probe()
513 	ps8622->bridge.type = DRM_MODE_CONNECTOR_LVDS;  in ps8622_probe()
514 	ps8622->bridge.of_node = dev->of_node;  in ps8622_probe()
515 	drm_bridge_add(&ps8622->bridge);  in ps8622_probe()
526 	backlight_device_unregister(ps8622->bl);  in ps8622_remove()
527 	drm_bridge_remove(&ps8622->bridge);  in ps8622_remove()
550 MODULE_DESCRIPTION("Parade ps8622/ps8625 eDP-LVDS converter driver");